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dc.contributor.authorPricop, Bogdan
dc.contributor.authorLohan, Monica Nicoleta
dc.contributor.authorBorza, Firuța
dc.contributor.authorLupu, Nicoleta
dc.contributor.authorSuru, Marius-Gabriel
dc.contributor.authorMihalache, Elena
dc.contributor.authorComăneci, Radu Ioachim
dc.contributor.authorBujoreanu, Leandru-Gheorghe
dc.date.accessioned2018-08-13T11:10:31Z
dc.date.available2018-08-13T11:10:31Z
dc.date.issued2014
dc.identifier.issn1453 – 083X
dc.identifier.urihttp://10.11.10.50/xmlui/handle/123456789/5294
dc.descriptionThe Annals of "Dunarea de Jos" University of Galati Fascicle IX Metallurgy and Materials Science 1453 – 083Xro_RO
dc.description.abstractThe pseudoelastic responses of two types of iron base shape memory alloys (SMAs) were introduced and discussed. The former was based on Fe-Mn-Si system, obtained by classical (CM) and by powder metallurgy (PM) manufacturing. The latter was based on Fe-Ni-Co system being processed by a non conventional technology comprising melt spinning and heat treatment. In the case of FeMnSibased SMAs, CM specimens obviously experienced larger ductility and a more pronounced pseudoelastic response while PM specimens were stiffer and underwent larger work-hardening. On the other hand, melt spun FeNiCo-based SMAs revealed an outstanding superelasticity in the case of micro-indentation tests. By means of scanning electron microscopy (SEM) observations, a martensitic morphology was identified in FeMnSi-based SMAs while FeNiCo-based SMAs revealed an austenitic structure. The presence of both α’ and ε martensites was confirmed in FeMnSibased SMAs by means of X-ray diffraction (XRD). In fully austenitic melt-spun and aged FeNiCo-based SMAs, no martensite was indentified on XRD patterns. These results sustain the conclusion that FeMnSi-based SMAs, that contain pre-existing martensite, experienced a pseudoelastic behavior caused by crystallographic reorientation of martensite plate variants while austenitic FeNiCo-based SMAs experienced a reversible stress-induced martensitic transformation, at room temperature.ro_RO
dc.language.isoenro_RO
dc.publisherUniversitatea "Dunărea de Jos" din Galațiro_RO
dc.subjectshape memory alloyro_RO
dc.subjectpseudoelasticityro_RO
dc.subjecttensile testsro_RO
dc.subjectmicroindentationro_RO
dc.subjectsuperelasticityro_RO
dc.subjectstress induced martensitero_RO
dc.titleStructural Changes Associated with the Pseudoelastic Response of Fe-based Shape Memory Alloysro_RO
dc.typeArticlero_RO


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